function [ status ] = mx_eyelink_open_node( node )
%MX_EYELINK_OPEN_NODE Allows the computer to connect to tracker, where the 
% tracker is on the same network.
%
% Parameters:
% node 	Must be an address returned by eyelink_poll_trackers() and 
% eyelink_poll_responses() to connect to any tracker.
% busytest 	If non-zero the call to eyelink_open_node() will not disconnect 
% an existing connection.
% Returns:
% 0 if successful.
% Returns:
% 0 if successful.
% -200 if link could not be established.
% -201 if tracker did not respond.
% -203 if the versions of the EyeLink library and tracker are incompatible.
%   
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% Copyright Eduardo Aponte 2013
% aponteeduardo@gmail.com